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path: root/drivers/video/au1100fb.c
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Diffstat (limited to 'drivers/video/au1100fb.c')
-rw-r--r--drivers/video/au1100fb.c676
1 files changed, 676 insertions, 0 deletions
diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c
new file mode 100644
index 000000000000..cacd88cc84ab
--- /dev/null
+++ b/drivers/video/au1100fb.c
@@ -0,0 +1,676 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ * Au1100 LCD Driver.
+ *
+ * Copyright 2002 MontaVista Software
+ * Author: MontaVista Software, Inc.
+ * ppopov@mvista.com or source@mvista.com
+ *
+ * Copyright 2002 Alchemy Semiconductor
+ * Author: Alchemy Semiconductor
+ *
+ * Based on:
+ * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
+ * Created 28 Dec 1997 by Geert Uytterhoeven
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/au1000.h>
+#include <asm/pb1100.h>
+#include "au1100fb.h"
+
+#include <video/fbcon.h>
+#include <video/fbcon-mfb.h>
+#include <video/fbcon-cfb2.h>
+#include <video/fbcon-cfb4.h>
+#include <video/fbcon-cfb8.h>
+#include <video/fbcon-cfb16.h>
+
+/*
+ * Sanity check. If this is a new Au1100 based board, search for
+ * the PB1100 ifdefs to make sure you modify the code accordingly.
+ */
+#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3)
+#else
+error Unknown Au1100 board
+#endif
+
+#define CMAPSIZE 16
+
+static int my_lcd_index; /* default is zero */
+struct known_lcd_panels *p_lcd;
+AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR;
+
+struct au1100fb_info {
+ struct fb_info_gen gen;
+ unsigned long fb_virt_start;
+ unsigned long fb_size;
+ unsigned long fb_phys;
+ int mmaped;
+ int nohwcursor;
+
+ struct { unsigned red, green, blue, pad; } palette[256];
+
+#if defined(FBCON_HAS_CFB16)
+ u16 fbcon_cmap16[16];
+#endif
+};
+
+
+struct au1100fb_par {
+ struct fb_var_screeninfo var;
+
+ int line_length; // in bytes
+ int cmap_len; // color-map length
+};
+
+
+static struct au1100fb_info fb_info;
+static struct au1100fb_par current_par;
+static struct display disp;
+
+int au1100fb_init(void);
+void au1100fb_setup(char *options, int *ints);
+static int au1100fb_mmap(struct fb_info *fb, struct file *file,
+ struct vm_area_struct *vma);
+static int au1100_blank(int blank_mode, struct fb_info_gen *info);
+static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
+ u_long arg, int con, struct fb_info *info);
+
+void au1100_nocursor(struct display *p, int mode, int xx, int yy){};
+
+static struct fb_ops au1100fb_ops = {
+ owner: THIS_MODULE,
+ fb_get_fix: fbgen_get_fix,
+ fb_get_var: fbgen_get_var,
+ fb_set_var: fbgen_set_var,
+ fb_get_cmap: fbgen_get_cmap,
+ fb_set_cmap: fbgen_set_cmap,
+ fb_pan_display: fbgen_pan_display,
+ fb_ioctl: au1100fb_ioctl,
+ fb_mmap: au1100fb_mmap,
+};
+
+static void au1100_detect(void)
+{
+ /*
+ * This function should detect the current video mode settings
+ * and store it as the default video mode
+ */
+
+ /*
+ * Yeh, well, we're not going to change any settings so we're
+ * always stuck with the default ...
+ */
+
+}
+
+static int au1100_encode_fix(struct fb_fix_screeninfo *fix,
+ const void *_par, struct fb_info_gen *_info)
+{
+ struct au1100fb_info *info = (struct au1100fb_info *) _info;
+ struct au1100fb_par *par = (struct au1100fb_par *) _par;
+ struct fb_var_screeninfo *var = &par->var;
+
+ memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+
+ fix->smem_start = info->fb_phys;
+ fix->smem_len = info->fb_size;
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->type_aux = 0;
+ fix->visual = (var->bits_per_pixel == 8) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+ fix->ywrapstep = 0;
+ fix->xpanstep = 1;
+ fix->ypanstep = 1;
+ fix->line_length = current_par.line_length;
+ return 0;
+}
+
+static void set_color_bitfields(struct fb_var_screeninfo *var)
+{
+ switch (var->bits_per_pixel) {
+ case 8:
+ var->red.offset = 0;
+ var->red.length = 8;
+ var->green.offset = 0;
+ var->green.length = 8;
+ var->blue.offset = 0;
+ var->blue.length = 8;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ break;
+ case 16: /* RGB 565 */
+ var->red.offset = 11;
+ var->red.length = 5;
+ var->green.offset = 5;
+ var->green.length = 6;
+ var->blue.offset = 0;
+ var->blue.length = 5;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ break;
+ }
+
+ var->red.msb_right = 0;
+ var->green.msb_right = 0;
+ var->blue.msb_right = 0;
+ var->transp.msb_right = 0;
+}
+
+static int au1100_decode_var(const struct fb_var_screeninfo *var,
+ void *_par, struct fb_info_gen *_info)
+{
+
+ struct au1100fb_par *par = (struct au1100fb_par *)_par;
+
+ /*
+ * Don't allow setting any of these yet: xres and yres don't
+ * make sense for LCD panels.
+ */
+ if (var->xres != p_lcd->xres ||
+ var->yres != p_lcd->yres ||
+ var->xres != p_lcd->xres ||
+ var->yres != p_lcd->yres) {
+ return -EINVAL;
+ }
+ if(var->bits_per_pixel != p_lcd->bpp) {
+ return -EINVAL;
+ }
+
+ memset(par, 0, sizeof(struct au1100fb_par));
+ par->var = *var;
+
+ /* FIXME */
+ switch (var->bits_per_pixel) {
+ case 8:
+ par->var.bits_per_pixel = 8;
+ break;
+ case 16:
+ par->var.bits_per_pixel = 16;
+ break;
+ default:
+ printk("color depth %d bpp not supported\n",
+ var->bits_per_pixel);
+ return -EINVAL;
+
+ }
+ set_color_bitfields(&par->var);
+ par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16;
+ return 0;
+}
+
+static int au1100_encode_var(struct fb_var_screeninfo *var,
+ const void *par, struct fb_info_gen *_info)
+{
+
+ *var = ((struct au1100fb_par *)par)->var;
+ return 0;
+}
+
+static void
+au1100_get_par(void *_par, struct fb_info_gen *_info)
+{
+ *(struct au1100fb_par *)_par = current_par;
+}
+
+static void au1100_set_par(const void *par, struct fb_info_gen *info)
+{
+ /* nothing to do: we don't change any settings */
+}
+
+static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green,
+ unsigned *blue, unsigned *transp,
+ struct fb_info *info)
+{
+
+ struct au1100fb_info* i = (struct au1100fb_info*)info;
+
+ if (regno > 255)
+ return 1;
+
+ *red = i->palette[regno].red;
+ *green = i->palette[regno].green;
+ *blue = i->palette[regno].blue;
+ *transp = 0;
+
+ return 0;
+}
+
+static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ struct au1100fb_info* i = (struct au1100fb_info *)info;
+ u32 rgbcol;
+
+ if (regno > 255)
+ return 1;
+
+ i->palette[regno].red = red;
+ i->palette[regno].green = green;
+ i->palette[regno].blue = blue;
+
+ switch(p_lcd->bpp) {
+#ifdef FBCON_HAS_CFB8
+ case 8:
+ red >>= 10;
+ green >>= 10;
+ blue >>= 10;
+ p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) |
+ ((green&0x3f)<<5) | ((red&0x1f)<<11);
+ break;
+#endif
+#ifdef FBCON_HAS_CFB16
+ case 16:
+ i->fbcon_cmap16[regno] =
+ ((red & 0xf800) >> 0) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11);
+ break;
+#endif
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+
+static int au1100_blank(int blank_mode, struct fb_info_gen *_info)
+{
+
+ switch (blank_mode) {
+ case VESA_NO_BLANKING:
+ /* turn on panel */
+ //printk("turn on panel\n");
+#ifdef CONFIG_MIPS_PB1100
+ p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
+ au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
+ PB1100_G_CONTROL);
+#endif
+#ifdef CONFIG_MIPS_HYDROGEN3
+ /* Turn controller & power supply on, GPIO213 */
+ au_writel(0x20002000, 0xB1700008);
+ au_writel(0x00040000, 0xB1900108);
+ au_writel(0x01000100, 0xB1700008);
+#endif
+ au_sync();
+ break;
+
+ case VESA_VSYNC_SUSPEND:
+ case VESA_HSYNC_SUSPEND:
+ case VESA_POWERDOWN:
+ /* turn off panel */
+ //printk("turn off panel\n");
+#ifdef CONFIG_MIPS_PB1100
+ au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight,
+ PB1100_G_CONTROL);
+ p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO;
+#endif
+ au_sync();
+ break;
+ default:
+ break;
+
+ }
+ return 0;
+}
+
+static void au1100_set_disp(const void *unused, struct display *disp,
+ struct fb_info_gen *info)
+{
+ disp->screen_base = (char *)fb_info.fb_virt_start;
+
+ switch (disp->var.bits_per_pixel) {
+#ifdef FBCON_HAS_CFB8
+ case 8:
+ disp->dispsw = &fbcon_cfb8;
+ if (fb_info.nohwcursor)
+ fbcon_cfb8.cursor = au1100_nocursor;
+ break;
+#endif
+#ifdef FBCON_HAS_CFB16
+ case 16:
+ disp->dispsw = &fbcon_cfb16;
+ disp->dispsw_data = fb_info.fbcon_cmap16;
+ if (fb_info.nohwcursor)
+ fbcon_cfb16.cursor = au1100_nocursor;
+ break;
+#endif
+ default:
+ disp->dispsw = &fbcon_dummy;
+ disp->dispsw_data = NULL;
+ break;
+ }
+}
+
+static int
+au1100fb_mmap(struct fb_info *_fb,
+ struct file *file,
+ struct vm_area_struct *vma)
+{
+ unsigned int len;
+ unsigned long start=0, off;
+ struct au1100fb_info *fb = (struct au1100fb_info *)_fb;
+
+ if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
+ return -EINVAL;
+ }
+
+ start = fb_info.fb_phys & PAGE_MASK;
+ len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size);
+
+ off = vma->vm_pgoff << PAGE_SHIFT;
+
+ if ((vma->vm_end - vma->vm_start + off) > len) {
+ return -EINVAL;
+ }
+
+ off += start;
+ vma->vm_pgoff = off >> PAGE_SHIFT;
+
+ pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
+ //pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT;
+ pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
+
+ /* This is an IO map - tell maydump to skip this VMA */
+ vma->vm_flags |= VM_IO;
+
+ if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot)) {
+ return -EAGAIN;
+ }
+
+ fb->mmaped = 1;
+ return 0;
+}
+
+int au1100_pan_display(const struct fb_var_screeninfo *var,
+ struct fb_info_gen *info)
+{
+ return 0;
+}
+
+static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
+ u_long arg, int con, struct fb_info *info)
+{
+ /* nothing to do yet */
+ return -EINVAL;
+}
+
+static struct fbgen_hwswitch au1100_switch = {
+ au1100_detect,
+ au1100_encode_fix,
+ au1100_decode_var,
+ au1100_encode_var,
+ au1100_get_par,
+ au1100_set_par,
+ au1100_getcolreg,
+ au1100_setcolreg,
+ au1100_pan_display,
+ au1100_blank,
+ au1100_set_disp
+};
+
+
+int au1100_setmode(void)
+{
+ int words;
+
+ /* FIXME Need to accomodate for swivel mode and 12bpp, <8bpp*/
+ switch (p_lcd->mode_control & LCD_CONTROL_SM)
+ {
+ case LCD_CONTROL_SM_0:
+ case LCD_CONTROL_SM_180:
+ words = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 32;
+ break;
+ case LCD_CONTROL_SM_90:
+ case LCD_CONTROL_SM_270:
+ /* is this correct? */
+ words = (p_lcd->xres * p_lcd->bpp) / 8;
+ break;
+ default:
+ printk("mode_control reg not initialized\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Setup LCD controller
+ */
+
+ p_lcd_reg->lcd_control = p_lcd->mode_control;
+ p_lcd_reg->lcd_intstatus = 0;
+ p_lcd_reg->lcd_intenable = 0;
+ p_lcd_reg->lcd_horztiming = p_lcd->mode_horztiming;
+ p_lcd_reg->lcd_verttiming = p_lcd->mode_verttiming;
+ p_lcd_reg->lcd_clkcontrol = p_lcd->mode_clkcontrol;
+ p_lcd_reg->lcd_words = words - 1;
+ p_lcd_reg->lcd_dmaaddr0 = fb_info.fb_phys;
+
+ /* turn on panel */
+#ifdef CONFIG_MIPS_PB1100
+ au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
+ PB1100_G_CONTROL);
+#endif
+#ifdef CONFIG_MIPS_HYDROGEN3
+ /* Turn controller & power supply on, GPIO213 */
+ au_writel(0x20002000, 0xB1700008);
+ au_writel(0x00040000, 0xB1900108);
+ au_writel(0x01000100, 0xB1700008);
+#endif
+
+ p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
+
+ return 0;
+}
+
+
+int __init au1100fb_init(void)
+{
+ uint32 sys_clksrc;
+ unsigned long page;
+
+ /*
+ * Get the panel information/display mode and update the registry
+ */
+ p_lcd = &panels[my_lcd_index];
+
+ switch (p_lcd->mode_control & LCD_CONTROL_SM)
+ {
+ case LCD_CONTROL_SM_0:
+ case LCD_CONTROL_SM_180:
+ p_lcd->xres =
+ (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
+ p_lcd->yres =
+ (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
+ break;
+ case LCD_CONTROL_SM_90:
+ case LCD_CONTROL_SM_270:
+ p_lcd->yres =
+ (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
+ p_lcd->xres =
+ (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
+ break;
+ }
+
+ /*
+ * Panel dimensions x bpp must be divisible by 32
+ */
+ if (((p_lcd->yres * p_lcd->bpp) % 32) != 0)
+ printk("VERT %% 32\n");
+ if (((p_lcd->xres * p_lcd->bpp) % 32) != 0)
+ printk("HORZ %% 32\n");
+
+ /*
+ * Allocate LCD framebuffer from system memory
+ */
+ fb_info.fb_size = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 8;
+
+ current_par.var.xres = p_lcd->xres;
+ current_par.var.xres_virtual = p_lcd->xres;
+ current_par.var.yres = p_lcd->yres;
+ current_par.var.yres_virtual = p_lcd->yres;
+ current_par.var.bits_per_pixel = p_lcd->bpp;
+
+ /* FIX!!! only works for 8/16 bpp */
+ current_par.line_length = p_lcd->xres * p_lcd->bpp / 8; /* in bytes */
+ fb_info.fb_virt_start = (unsigned long )
+ __get_free_pages(GFP_ATOMIC | GFP_DMA,
+ get_order(fb_info.fb_size + 0x1000));
+ if (!fb_info.fb_virt_start) {
+ printk("Unable to allocate fb memory\n");
+ return -ENOMEM;
+ }
+ fb_info.fb_phys = virt_to_bus((void *)fb_info.fb_virt_start);
+
+ /*
+ * Set page reserved so that mmap will work. This is necessary
+ * since we'll be remapping normal memory.
+ */
+ for (page = fb_info.fb_virt_start;
+ page < PAGE_ALIGN(fb_info.fb_virt_start + fb_info.fb_size);
+ page += PAGE_SIZE) {
+ SetPageReserved(virt_to_page(page));
+ }
+
+ memset((void *)fb_info.fb_virt_start, 0, fb_info.fb_size);
+
+ /* set freqctrl now to allow more time to stabilize */
+ /* zero-out out LCD bits */
+ sys_clksrc = au_readl(SYS_CLKSRC) & ~0x000003e0;
+ sys_clksrc |= p_lcd->mode_toyclksrc;
+ au_writel(sys_clksrc, SYS_CLKSRC);
+
+ /* FIXME add check to make sure auxpll is what is expected! */
+ au1100_setmode();
+
+ fb_info.gen.parsize = sizeof(struct au1100fb_par);
+ fb_info.gen.fbhw = &au1100_switch;
+
+ strcpy(fb_info.gen.info.modename, "Au1100 LCD");
+ fb_info.gen.info.changevar = NULL;
+ fb_info.gen.info.node = -1;
+
+ fb_info.gen.info.fbops = &au1100fb_ops;
+ fb_info.gen.info.disp = &disp;
+ fb_info.gen.info.switch_con = &fbgen_switch;
+ fb_info.gen.info.updatevar = &fbgen_update_var;
+ fb_info.gen.info.blank = &fbgen_blank;
+ fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
+
+ /* This should give a reasonable default video mode */
+ fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
+ fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
+ fbgen_set_disp(-1, &fb_info.gen);
+ fbgen_install_cmap(0, &fb_info.gen);
+ if (register_framebuffer(&fb_info.gen.info) < 0)
+ return -EINVAL;
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ GET_FB_IDX(fb_info.gen.info.node),
+ fb_info.gen.info.modename);
+
+ return 0;
+}
+
+
+void au1100fb_cleanup(struct fb_info *info)
+{
+ unregister_framebuffer(info);
+}
+
+
+void au1100fb_setup(char *options, int *ints)
+{
+ char* this_opt;
+ int i;
+ int num_panels = sizeof(panels)/sizeof(struct known_lcd_panels);
+
+
+ if (!options || !*options)
+ return;
+
+ for(this_opt=strtok(options, ","); this_opt;
+ this_opt=strtok(NULL, ",")) {
+ if (!strncmp(this_opt, "panel:", 6)) {
+#if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100)
+ /* Read Pb1100 Switch S10 ? */
+ if (!strncmp(this_opt+6, "s10", 3))
+ {
+ int panel;
+ panel = *(volatile int *)0xAE000008; /* BCSR SWITCHES */
+ panel >>= 8;
+ panel &= 0x0F;
+ if (panel >= num_panels) panel = 0;
+ my_lcd_index = panel;
+ }
+ else
+#endif
+ /* Get the panel name, everything else if fixed */
+ for (i=0; i<num_panels; i++) {
+ if (!strncmp(this_opt+6, panels[i].panel_name,
+ strlen(this_opt))) {
+ my_lcd_index = i;
+ break;
+ }
+ }
+ }
+ else if (!strncmp(this_opt, "nohwcursor", 10)) {
+ printk("nohwcursor\n");
+ fb_info.nohwcursor = 1;
+ }
+ }
+
+ printk("au1100fb: Panel %d %s\n", my_lcd_index,
+ panels[my_lcd_index].panel_name);
+}
+
+
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+int init_module(void)
+{
+ return au1100fb_init();
+}
+
+void cleanup_module(void)
+{
+ au1100fb_cleanup(void);
+}
+
+MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
+MODULE_DESCRIPTION("Au1100 LCD framebuffer device driver");
+#endif /* MODULE */
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